class Sum { 

    int n;

    float f() { 

       float sum=0;

       for(int i=1;i<=n;i++)

          sum=sum+i;

       return sum;  

    }

}

class Average extends Sum {

    int n;  

    float f() { 

      float c;

      super.n=n;

      c=super.f();

      return c/n; 

    }

   float g() {

       float c;

       c=super.f();

       return c/2; 

   }

}

public class Example5_7 {

   public static void main(String args[]) {

       Average aver=new Average();

       aver.n=100;

      

       float resultTwo=aver.g(); float resultOne=aver.f();

       System.out.println("resultOne="+resultOne);

       System.out.println("resultTwo="+resultTwo);

   }

}
